© 2021, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.In this study, optimum dimensioning of a reinforced concrete cantilever retaining wall under static loads was made by developing a method using the Jaya algorithm. During the optimization process, the retaining wall stability checks, cross-section capacities and controls including reinforced concrete structural design rules were made. With the optimum design, it is aimed that the retaining wall cross-section dimensions reach the optimum value. The total material cost is defined as the objective function and the cross-section dimensions are defined to be variable. In order to determine the effect of the front encasement (toe projection), different design limits are entered into the program, and program outputs are examined. The results of the analysis showed that the standard deviation value increases as the design limits get narrow. The dimensioning of the retaining wall was made according to TS 7994 (Soil Resistance Structures; Classification, Properties and Project Design Principles) and the reinforced concrete design was made according to TS 500 (Design and Construction Rules of Reinforced Concrete Structures) rules. The Jaya optimization method has been found to be superior to the existing methods, and it has been understood that it is appropriate to use the method in the optimum design of the retaining wall.